The Constitution’s framers held as inviolable citizens’ right to petition government for a redress of grievances. So what does it say about rookie Public Advocate Bill de Blasio’s opinion of himself that he thinks New Yorkers need his help to wave placards on City Hall steps?

De Blasio yesterday announced the creation of a new “community-organizing” department within his office — purportedly to “help neighborhood activists build grass-roots coalitions.”

Funny: We thought that “grass-roots” spring up naturally as concerned citizens exercise their First Amendment rights.

But perhaps the wheels of democracy turn too slowly for de Blasio. He plans: